Bimitbi sensatjd de lavaud



D. S. DE LAVAUD.

ROTARY CASTING MACHINE.

APPLICATION mug APR. 12. 1919.

Patented Dec. 2, 1919.

. lllfldlrllfb DIMITRI SENSAUD DE LAVAUD, OF NEW YORK, N. Y.

ROTARY CASTING-MACHINE.

Specification of Letters Patent.

Patented Dec. 2, 1919.

Application filed April 12, 1919. Serial No. 289,595.

T 0 all whom it may concern:

Be it known that I, DIMITRI SENsAUD DE LAVAUD, a citizen of the United States of Brazil, and a resident of New York, in the county of New York and State of New York, have invented certain new and use:

ful Improvements in Rotary Casting-Machines, of which the following is a specification.

This invention relates to rotary casting, and more particularly to the rotatable trough used in rotary casting machines.

The present invention is an improved construction of the water-cooled troughdisclosed and claimed broadly in United States Letters Patent No. 1,27 6,038 issued to me. According to that patent, the trough is continuously cooled by a water circulation under pressure in all angular positions of the trough, by constructing the trough-shell of three concentric tubes or pipes spaced one within the other to provide two substantially annular water chambers, through one of which the admitted liquid flows in one direction and through the other of which the liquid, after leaving the first chamber, flows in the reverse direction. Such a construction isvery satisfactory, but the mechanical difliculties of constructing the trough are considerable, and the fact that the trough is cooled at thebottom as well as at the sides, and is also cooled'opposite the portion of. the pouring slot of greater width at one end of the trough for taking care of the bell of a pipe to be cast, rather than merely opposite the lengthof the slot for making the main body of the pipe, holds the diameter of the trough larger than would otherwise be required. Of course the smaller the diameter of the trough, and the more nearly the external conformation of the trough approaches the cylindrical, the better, because a pipe cast of any external diameter cannot have an internal diameter smaller than the maximum lateral dimen sion of the trough.

I have discovered that perfectly practical operation may be obtained with a trough which is only water-cooled at the sides, and not at the bottom of the trough, and further, that the trough need not be watercooled at all opposite the portion of the slot of greater Width. And I have devised a construction for taking advantage of these discoveries, as will now be described.

The construction is preferably embodied as shown in the appended drawing, which,

however, is merely illustrative of the invention.

The ends sought by the present invention result from novel structural combinations, and therefore, before structurally describing the embodiment shown in the drawing, such structural combinations will not be generally referred to; attention being directed {0. the appended claims in the latter particu- In the accompanying drawing,

Figure 1 is an axial sectional view, the trough being shown broken away intermediate its latter;

Figs. 2, 3 and 4 are, respectively, transverse sections, on an enlarged scale, taken on lines 2-2, 3-3 and 4-4 of Fig. 1;

Fig. 5 is a top plan'view of the left hand end of the trough; and p Fig. 6 is a transverse section, taken on line 6-6 of Fig. 5.

The trough includes ashell 7 which may be a length of pipe of suitable-diameter. The trough proper is the length of such pipe in which is cut an elongated slot 8, to act as the pouring slot of the trough. The trough also includes a tubular portion for journaling the trough proper, such tubular portion here being a prolongation of pipe 7 as indicated at 7 At .the free end of the trough proper an end closure 9 is suitably secured in place, as by welding, and carries, axially of the trough, a pivot pin 10.

The opposite end of the entire trough,

that is, of the tubular portion to be ournaled to rotatably mount the trough, is closed by a cap 11 threaded thereon 'and ends to condense the length of the v having an offset central extension 12 bored from end to end at 13.

In order to establish walls, which, while allowing for the first and second watercooling, compartments below described, will permit a refractory lining 14 to be conveniently setin place as shown in the drawing,

the following parts are provided. The

trough is equipped with these parts, in connection with the formation of the pouring slot 8, preferably in the following order.

The trough-shell 7 is longitudinally slotted along four parallel lines, between the points l5 and 16 of Fig. 1, the lines being are set in the" slots and there welded, as shown in Figs. 1 and 3. Next the pouring slot 8 is cut out of the shell.wall. Then the transverse partitions 19 and 20, 20 are inserted and welded in place.

The plate 19 has the shape shown in Fig. 2, and is edge-welded all around to the inside of the shell and to the inner sides of the partitions 18.

Each of the plates 20 is segment-shaped as shown in, Figs. 3 and 6, and each plate 20 is Welded along its straight edge over the front edge of a partition 18, and edgewelded at its circular edge to the inside of the shell.

It will be seen that the refractory lining 14 provides, below the pouring slot 8, a molten-metalv receiving pocket 21; this pocket being of substantially U-shape in cross-section below the portion of the pouring slot of greater width and being of substantially V-shape in cross-section below the remaining portion of the slot.

It will also be seen that the locations of the two upper slots 17, relative to the narrower portion of the pouring slot 8 opposite which the partitions 18 are disposed, are such that overhanging eaves 22 are provided. Along these eaves at spaced intervals depending pins 23 are set at their upper ends, these pins performing a very important function'in that they facilitate lining the trough with the refractory material opposite the partitions 18 and protect the lining against crumbling 0r chipping away near the side edges of the pouring slot 8 during prolonged operation of the casting machine.

The sideportions of the trough shell, the partitions 18 and the transverse partitions 20 provide what will be termed the first water-cooling compartments 24, which, it will be observed, are at the sides of the trough only, and do not extend. so far to the left as to lie opposite the portion of the pouring slot 8 of greater width.

Two 'verticallyspaced pipes 25 in'each first compartment 24, each of which pipes may be termed a second water-cooling compartment, are provided, having open left ends. At their right threads, these pipes are also open, but carry external screw threads, as shown most clearly in Fig.1, whereby they may be screwed into tapped transverse openings in a laterally disposed circular fixture 26 to be rigidly clamped or otherwise suitably fixedly held in place between the extreme right-hand end-edge of the trough-shell and the inner face of cap 11. In turn, consequently, the pipes 25 are rigidly held in the locations illustrated.

The reference characters 27 and 28 in Fig. 1 represent the inlet and outlet openings for the cooling water (or other suitable liquid). Assuming the water enters at 27, preferably 1. In a trough construction for rotary casting machines, the combination of an elongated shell having an elongated pouring slot in its top, partitions in the shell at opposite sides of the pouring slot for forming a first elongated compartment. within the shell at each side of a moltenmetal receiving pocket in the shell below the pouring slot, a second elongated compartment within each of the first compartments, and means for admitting cooling liquid to one end of each second compartment, the opposite end of each second compartment being open to admit such liquid to the first compartment from the second compartment to cause the liquid to flow in the first compartment longitudinally of the shell in a direction opposite to the direction of fiow of the liquid through the second compartment.

2. The trough construction defined in claim 1, wherein means are provided for discharging the cooling liquid from the interior of the shell, such means including a discharge opening at the end of each first compartment opposite to the end thereof whereat the liquid enters the first compartment from the second compartment.

3. The trough construction defined in claim 1, wherein each second compartment is a length ofpipe of substantially circular cross-section.

4. The trough construction defined in a claim 1, wherein such shell is a hollow member of substantially circular cross-section and wherein each of said partltions is formed at least in part of a sheet-like plate.

arranged with its flat portion substantially vertical.

5. The trough construction defined in claim 1, wherein said partitions are downwardly converged toward the center of the trough below the pouring slot.

6. The trough construction defined in claim 4, wherein two of such second compartments are in each of the first compartments, one second compartment spacedi above the other in each first compartment.

7 The trough construction defined in claim 6, wherein each of said second com partments is a length of pipe of substantially circular cross-section.

, the pouring slot, each first compartment being located alongside the portion of the pouring slot in prolongation of said portion of greater width.

. 9. The trough construction defined in claim 7 wherein such shell carries a tubular .portion to .be journaled for permitting rotation of the trough, and wherein a fixture is the interior of said tubular seated and fixed in said tubular portion,

transversely of the trough, such fixture having the four second compartments rigidly mounted thereon. r

10. The trough construction defined in claim 9, wherein said fixture is a transverse partition in said tubular portion, having four transverse openings there-through, each in connection with the interior of one of the second compartments, and wherein the means for admitting cooling fluid also-ineludes means for admitting such fluid in ortion at the side of said transverse partition opposite to the side thereof from which the four second compartments project.

11. The trough construction defined in claim 1, wherein such partitions are set in the shell with the top edges of the partitions substantially parallel to but. spaced a distance from the side edges of the pouring slot, to provide eaves overhanging the top of the pocket at opposite sides'of the pouring slot, and pins are set at their upper ends in said eaves to de end substantially parallelly with the 'partltions and spaced therefrom at intervals the slot.

12. The trough construction defined in claim 1, wherein such shell is a hollow member of substantially circular cross-section, and wherein the partitions are arranged in substantial parallelism but downwardly converging below the slot, the shell having elongated slots cut therein and the upper along the length of and lower edge portions of the partitions being'set in such slots and there weldedin place.

13. The trough construction defined in .claim 13, wherein the circular edge of a shaped plate is welded at such edge to the inside of the shell and a marginal strip of said plate alongside its stralght edge is welded to the end edge of the partition.

15. The trough construction defined in claim 1, wherein near one end of thetrough the pouring slot is of greater width and wherein the constructions defined for liquidcooling the trough extend from near the other end of the trough only to the beginning of such'portion of greater width.

16. The trough construction defined in claim 15, wherein a refractory lining is provided in the trough which opposite the slot 'POI'tlOIl of greater width is of substantially" U-shape in cross-section and which opposite the remaining slot portion is of substantially V-shape in cross-section.

'17. In a trough. construction for rotary casting machines, the combination of an elongated shell having an elongated pouring slot in-its top, and longitudinal artitions in the shell at opposite sides 0 the slot formingliquid-cooling compartments at the sides only of thejshell to establish a pocket for receiving molten metal below the pouring slot and between the partitions and the bottom-of the shell.

18. The trough defined in claim 17 wherein there is provided a refractory lining in the shell overlying the sides and bottom of the ocket.

Signed at New York in the county of New York and State of New York this 10 day of April A. D. 1919.

DIMITBI SENSAUD DE LAVAUD. 

